SplitAlternateFacetData.cpp

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#include "SplitAlternateFacetData.hpp"
#include <algorithm>
#include <array>
#include <cassert>
#include <vector>
#include <wmtk/Mesh.hpp>
#include <wmtk/autogen/SimplexDart.hpp>
#include <wmtk/operations/EdgeOperationData.hpp>
#include "ear_actions.hpp"
namespace wmtk::operations::internal {
namespace {
auto sort_op = [](const SplitAlternateFacetData::Data& a,
                  const SplitAlternateFacetData::Data& b) -> bool {
    return a.input.global_id() < b.input.global_id();
};
 
auto sort_int_op = [](const SplitAlternateFacetData::Data& value, const int64_t& facet_id) -> bool {
    return value.input.global_id() < facet_id;
};
} // namespace
 
void SplitAlternateFacetData::sort()
{
    std::sort(m_facet_maps.begin(), m_facet_maps.end(), sort_op);
}
 
// assumes the split cell map has been sorted
auto SplitAlternateFacetData::get_alternative_facets_it(const int64_t& input_cell) const
    -> AltData::const_iterator
{
    assert(std::is_sorted(m_facet_maps.begin(), m_facet_maps.end(), sort_op));
 
 
    auto it = std::lower_bound(m_facet_maps.begin(), m_facet_maps.end(), input_cell, sort_int_op);
    auto end = m_facet_maps.cend();
    // fix case where the lower bound was not the target value
    if (it != end && it->input.global_id() != input_cell) {
        it = end;
    }
    return it;
}
auto SplitAlternateFacetData::add_facet(wmtk::Mesh& mesh, const wmtk::Tuple& edge_tuple)
    -> const Data&
{
    const PrimitiveType pt = mesh.top_simplex_type();
    const std::vector<int64_t> new_eids = EdgeOperationData::request_simplex_indices(mesh, pt, 2);
    std::array<int64_t, 2> dat;
    std::copy(new_eids.begin(), new_eids.end(), dat.begin());
    return add_facet(mesh, edge_tuple, dat);
}
auto SplitAlternateFacetData::add_facet(
    const wmtk::Mesh& mesh,
    const wmtk::Tuple& edge_tuple,
    const std::array<int64_t, 2>& nfa) -> const Data&
{
    const PrimitiveType mesh_pt = mesh.top_simplex_type();
    const auto& sd = wmtk::autogen::SimplexDart::get_singleton(mesh_pt);
    return m_facet_maps.emplace_back(sd.dart_from_tuple(edge_tuple), nfa);
}
 
auto SplitAlternateFacetData::get_alternative_facets(const int64_t& input_cell) const
    -> const std::array<int64_t, 2>&
{
    auto it = get_alternative_facets_it(input_cell);
    assert(it != m_facet_maps.cend());
    return it->new_facet_indices;
}
auto SplitAlternateFacetData::get_alternative(
    const PrimitiveType mesh_pt,
    const Tuple& t,
    const PrimitiveType simplex_dimension) const -> Tuple
{
    assert(mesh_pt > PrimitiveType::Vertex);
    const auto alts_it = get_alternative_facets_it(t.global_cid());
    assert(alts_it != m_facet_maps.end());
 
    const auto& sd = wmtk::autogen::SimplexDart::get_singleton(mesh_pt);
 
    int64_t new_global_cid = alts_it->new_gid(mesh_pt, sd.valid_index_from_tuple(t));
 
 
    return {t.local_vid(), t.local_eid(), t.local_fid(), new_global_cid};
}
} // namespace wmtk::operations::internal